Reland: [Fasta] Do not emit default arguments at callsite

pkg/front_end/test/fasta/rasta/issue_000068.dart.direct.expect

Index: pkg/front_end/test/fasta/rasta/issue_000068.dart.direct.expect
diff --git a/pkg/front_end/test/fasta/rasta/issue_000068.dart.direct.expect b/pkg/front_end/test/fasta/rasta/issue_000068.dart.direct.expect
index cf9d888b051e772debc97bee4ccc960072df898d..b66e51d771d4ba7923058aa423e6bc01601921c8 100644
--- a/pkg/front_end/test/fasta/rasta/issue_000068.dart.direct.expect
+++ b/pkg/front_end/test/fasta/rasta/issue_000068.dart.direct.expect
@@ -24,11 +24,11 @@ class C extends self::B {
     ;
 }
 static method main() → dynamic {
-  exp::Expect::isFalse(new self::G::•<self::B>() is self::G<self::C>, null);
-  exp::Expect::isFalse(new self::G::•<self::A>() is self::G<self::B>, null);
-  exp::Expect::isFalse(new self::G::•<self::A>() is self::G<self::C>, null);
-  exp::Expect::isFalse(new self::G::•<core::Object>() is self::G<self::B>, null);
-  exp::Expect::isFalse(new self::G::•<core::int>() is self::G<self::B>, null);
-  exp::Expect::isFalse(new self::G::•<core::int>() is self::G<core::double>, null);
-  exp::Expect::isFalse(new self::G::•<core::int>() is self::G<core::String>, null);
+  exp::Expect::isFalse(new self::G::•<self::B>() is self::G<self::C>);
+  exp::Expect::isFalse(new self::G::•<self::A>() is self::G<self::B>);
+  exp::Expect::isFalse(new self::G::•<self::A>() is self::G<self::C>);
+  exp::Expect::isFalse(new self::G::•<core::Object>() is self::G<self::B>);
+  exp::Expect::isFalse(new self::G::•<core::int>() is self::G<self::B>);
+  exp::Expect::isFalse(new self::G::•<core::int>() is self::G<core::double>);
+  exp::Expect::isFalse(new self::G::•<core::int>() is self::G<core::String>);
 }